RC-Astro stand alone tools now

RC-Astro tools are moving beyond the plugin-only workflow.

BlurXTerminator, StarXTerminator, and NoiseXTerminator are now available through a new stand-alone RC-Astro command-line interface, giving astrophotographers, developers, and astronomy software projects a more flexible way to use RC-Astro processing outside PixInsight and Photoshop.

For years, RC-Astro has been closely tied to those host applications. That made sense. PixInsight remains one of the most important platforms in serious astrophotography, and Photoshop still has a place in many finishing workflows. But astrophotography processing has become more varied. Many imagers now use Siril, Seti Astro Suite Pro, custom scripts, Linux systems, batch workflows, or a mix of several tools.

The new RC-Astro stand alone tools give those users another path.

Why this release is important

Until now, StarXTerminator and NoiseXTerminator required PixInsight or Photoshop, while BlurXTerminator was tied to PixInsight because deconvolution needs linear, unstretched data.

The new command-line interface changes that.

Instead of opening a plugin inside a host application, users can run RC-Astro tools as separate commands. That gives the tools a way to fit into broader imaging workflows, including applications that can call the CLI directly.

For astrophotographers who already rely on BlurXTerminator, StarXTerminator, or NoiseXTerminator, this is a meaningful shift. The tools can now follow the workflow instead of forcing the workflow to stay inside one application.

A command-line path for serious imagers

A CLI release may not sound exciting to every user at first, but for advanced imagers and developers, it is a practical move.

Command-line tools can be scripted. They can be called by other applications. They can run repeatable settings. They can support batch processing. They can also become part of larger automated pipelines, which is useful for imagers processing multiple panels, testing settings, or building a repeatable workflow from capture to final image.

That kind of flexibility is valuable.

Astrophotography processing is not always a single-program job. One imager may stack in Siril, use RC-Astro tools for deconvolution or star removal, finish in Photoshop, and archive everything through a custom folder structure. Another may prefer PixInsight for most steps but want a batch process outside the normal interface.

The stand-alone RC-Astro tools make those kinds of workflows easier to imagine.

Siril and Seti Astro Suite Pro are already involved

Two early integrations make this release more than a technical experiment.

RC-Astro says Siril and Seti Astro Suite Pro have already integrated the new CLI. That matters because it means users may not need to live in the terminal to benefit from the stand-alone tools. The CLI can do the processing in the background while another application provides the interface.

Siril is especially important here.

It has become a major option for astrophotographers who want a capable image processing platform without working entirely inside a commercial ecosystem. Bringing RC-Astro tools into Siril gives more users access to workflows that were previously associated mostly with PixInsight and Photoshop.

For Seti Astro Suite Pro users, the integration also points toward a future where RC-Astro processing can sit inside a wider range of modern astronomy software.

Existing licenses still matter

RC-Astro is not treating the stand-alone release as a way to make existing users buy everything again.

The CLI is free to download for license holders, and existing licenses for BlurXTerminator, StarXTerminator, and NoiseXTerminator continue to work. RC-Astro also says activation through the CLI will not consume an additional activation on computers where the PixInsight or Photoshop versions have already been activated.

That is the right approach.

Astrophotographers build trust with software over time. If a tool becomes part of a regular processing workflow, users do not want to be punished when the developer expands support to a new format. Keeping existing licenses valid makes the stand-alone release feel like an expansion instead of a reset.

New users can still purchase permanent licenses or request fully functional trial licenses through RC-Astro.

GPU support gets broader

GPU acceleration is another important part of the stand-alone release.

On Windows, RC-Astro says GPU support has expanded beyond NVIDIA. Any capable GPU supported by Microsoft Direct3D 12 can be used, including AMD and Intel GPUs. Acceleration is automatic, with no extra software libraries required beyond current Windows and GPU drivers.

That is a useful change.

Many imagers run laptops, mini PCs, or desktops that do not have NVIDIA hardware. Supporting AMD and Intel GPUs through Direct3D 12 makes the tools more practical across a wider range of systems.

On macOS, RC-Astro uses Apple's CoreML library, with GPU acceleration available on Apple silicon and Intel Macs that can run macOS 14 Sonoma or later. On Linux, GPU acceleration currently requires NVIDIA hardware, though CPU fallback is available.

System requirements

Windows: Windows 10 version 1903 or later, or Windows 11

macOS: macOS 14 Sonoma or later

Linux: Ubuntu 22.04 or later

Windows GPU acceleration: Direct3D 12-capable NVIDIA, AMD, or Intel GPU

macOS GPU acceleration: CoreML

Linux GPU acceleration: NVIDIA GPU, with CPU fallback

Supported file formats: TIF, FITS, XISF, and PNG

Recommended files: 32-bit or 64-bit floating-point files for linear, unstretched data

Supported but not ideal: 8-bit integer images

Batch processing is part of the appeal

Batch processing may be one of the most useful reasons to care about the new CLI.

Astrophotographers often work with more than one image. Mosaics, multiple targets, test runs, reprocessed older data, and different versions of the same object can all create repetitive processing steps. A command-line interface makes it easier to apply consistent settings across multiple files.

That can save time, but it can also improve consistency.

If an imager wants to test NoiseXTerminator settings across several outputs, or run StarXTerminator across multiple panels before assembling a mosaic, a CLI workflow can be cleaner than doing each step manually in a plugin interface.

This is where stand-alone tools become more than a convenience. They become infrastructure.

Offline use is supported

The RC-Astro CLI does not require a constant internet connection for normal use.

An online connection is needed for license activation, machine learning model downloads, and updates. Users can also download the needed ML models ahead of time, which helps prepare systems for offline processing.

That is useful for astronomy setups.

Many users process on observatory computers, travel systems, or machines that are not always connected. Others simply prefer to keep capture and processing systems more controlled. Being able to prepare models ahead of time makes the CLI more practical in those environments.

Why beta status makes sense

RC-Astro is calling this a beta release, and that is fair.

The CLI has to manage licenses, operating systems, image formats, machine learning models, GPU acceleration, product options, and application integration. That is a lot of moving pieces, especially when the goal is to make the tools work outside their original plugin hosts.

Users should treat the beta as a real testing period.

That means keeping original files safe, checking outputs carefully, and not building a critical workflow around the CLI without testing it first. For developers, the beta is also a chance to experiment with integration and provide feedback before the stand-alone tools become a more established part of the ecosystem.

Developers get a cleaner integration path

One of the most interesting parts of the release is not just for individual imagers.

RC-Astro says applications can query all parameters associated with a product and receive a machine-readable JSON specification. That can help software developers build interfaces automatically and keep them aligned as products and versions change.

That is a smart way to support integration.

Instead of asking every astronomy application to manually recreate settings panels and keep them updated by hand, the CLI can provide the information needed to build a user interface around each tool. If more software adopts that approach, RC-Astro tools could become available in a wider range of image processing environments.

For astronomy software developers, this is where the release becomes especially useful.

PixInsight and Photoshop plugins are not going away

The stand-alone tools do not replace the existing plugin versions.

RC-Astro says the PixInsight and Photoshop versions will continue to be updated, and new products will be available in all forms, including plugins and stand-alone versions.

That is important.

PixInsight remains a central platform for many serious astrophotographers, and plenty of users will continue using RC-Astro tools exactly as they do today. Photoshop users also still have a familiar path for StarXTerminator and NoiseXTerminator.

The CLI adds another option. It does not remove the old ones.

A bigger step for astrophotography workflows

RC-Astro stand alone tools now give astrophotographers more control over where and how they use some of the most recognizable processing tools in the hobby.

For PixInsight users, the plugin workflow remains. For Photoshop users, the familiar path remains. For Siril users, Seti Astro Suite Pro users, Linux users, developers, batch processors, and imagers building more flexible pipelines, the CLI opens a new door.

The release is still in beta, so some patience is expected. But the direction is strong.

BlurXTerminator, StarXTerminator, and NoiseXTerminator are no longer tied as tightly to one or two host applications. They can now become part of broader, cross-platform astrophotography workflows.

For a software ecosystem that keeps getting more diverse, RC-Astro stand alone tools now feel like a timely move.

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